Structural and geomorphological controls of the present-day landslide in the Moulares phosphate mines (western-central Tunisia)

Dhahri, Ferid; Benassi, Ramdhane; Mhamdi, Abdelkader; Zeyeni, Kamel; Boukadi, Noureddine

doi:10.1007/s10064-015-0827-5

Cited by 17 publications

(3 citation statements)

References 10 publications

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“…As noted by Zuza et al (2017), our future research will extend the mechanical strength the experiment of the fault in the Buzhaoba mining area so that we can accurately identify the reasons for slope deformation. Dhahri et al (2016) studied a landslide in the Moulares phosphate mine and concluded that structure and geomorphology can control slope stability. They proposed that it is hard to control slope stability through engineering plans and reasonable land use.…”

Section: Numerical Simulation Of the West Slope Stabilitymentioning

confidence: 99%

Effects of Tectonic Stresses and Structural Planes on Slope Deformation and Stability at the Buzhaoba Open Pit Mine, China

Chen

Goh²,

Liu

et al. 2019

JSM

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Tectonic stresses and structural planes are key factors that affect slope stability. The studies of the effect mechanism of the two factors on the slope deformation and instability have an important value for realizing an accurate evaluation of slope stability. The deformation and landslide problems of the west slope at the Buzhaoba open pit mine were analyzed. Tectonic stresses and structural planes were confirmed as the main factors of long-term deformation of the slope. According to an analysis of the regional structure, the principal stress direction of the Buzhaoba mine was 123° and the slope sliding mode and discriminant conditions were determined under the influence of tectonic stress. The principal stress direction was verified by comparison with the results of displacement monitoring and stability analysis of the slope. The factor of safety of the slope is 1.29 when considering tectonic stress and reduces by 7.19% when tectonic stress is not considered.

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Section: Numerical Simulation Of the West Slope Stabilitymentioning

confidence: 99%

Effects of Tectonic Stresses and Structural Planes on Slope Deformation and Stability at the Buzhaoba Open Pit Mine, China

Chen

Goh²,

Liu

et al. 2019

JSM

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show abstract

“…It includes various aspects, such as stability evaluation, engineering prevention and control, monitoring, and early warning research. The implementation of various tasks relies on a deep understanding of the formation mechanism and disaster process of mining landslides [10][11][12], which helps guide the prevention and reduction of landslide disasters in mining areas, reduce landslide risks, and ensure the safety of disaster-bearing bodies.…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis and Process Inversion of the “7.26” Landslide in the West Open-Pit Mine of Fushun, China

Meng

Chun-shan

et al. 2023

Water

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Mine landslides are geological disasters with the highest frequency and cause the greatest harm worldwide. This typically causes significant casualties and damage to property. The study of the formation mechanisms and kinematic processes of mine landslides is important for the prevention and control of mine geological disasters and mine production safety. This study examined the “7.26” landslide, which occurred in the West Open-pit Mine of Fushun, China, in 2016, based on detailed investigations, interferometric synthetic aperture radar (InSAR) monitoring, and numerical simulations. The mechanism of landslide formation was explored, its kinematic process was inverted, and its disaster evolution process was summarized. The results indicate that: (1) For the formation mechanism of the “7.26” landslide, in July 2015, the old sliding mass was reactivated and deformed along the dominant joints in the shale. The following year, owing to continuous rainfall during the rainy season, the sliding surface accelerated its connection. Finally, a rainstorm on 25–26 July 2016, triggered slope instability. (2) The process of continued movement after landslide instability was approximately 250 s. It can be divided into the landslide initiation (0–10 s), collision scraping (10–150 s), and accumulation stages (150–250 s). (3) The entire process of landslide disasters includes four stages. During the weak-deformation stage, the maximum deformation of the sliding mass monitored by InSAR was approximately 50 mm. During the strong deformation stage, the tensile cracks at the rear edge of the landslide continued to expand, and shear outlets at the front edge had already formed. During the instability and failure stages, rainstorms trigger slope instability, leading to landslides. During the sliding accumulation stage, the landslide mass transformed into debris flow along the slope surface and accumulated at the bottom of the pit. This study provides a theoretical basis for the subsequent evaluation, treatment, monitoring, and warning of landslides in the Fushun West Open-pit Mine and other deep excavation open-pit mines.

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“…Phosphorite is not renewable and replaceable. As an important strategic resource, it is the material basis of food supply and fine phosphorus chemical production (Dhahri et al, 2016;Zhang et al, 2020). Phosphorite deposits in China are dominated by sedimentary phosphorite that accounts for 79% of the reserves.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Stratum and Surface Deformation in Underground Phosphorite Mining Under Different Mining Methods

Wang²,

et al. 2022

Front. Earth Sci.

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With the ending of deep-concave open-pit phosphorite extractions and gradual exhausting of shallow mineral resources, stoping of phosphorite seams has entered or will enter into underground mining. Particularly for excavating slightly inclined thin and medium-thick phosphorite orebodies, roof and surface control under different mining methods is crucial for safe and efficient exploitations. In this study, the study area is located in Kunyang Phosphorite Mine characterized by slightly inclined thin and medium-thick deposits. Based on the occurrence conditions, orebody thickness, dip angle, and more factors, the mining methods of underground phosphorite are selected, including room and pillar mining, cement backfill mining, and caving mining. Numerical analysis on roof deformation and surface subsidence under the three methods is performed. The results show that the amount of roof and surface subsidence decreases successively by the caving method, room and pillar method, and cement backfill method. The maximum roof and surface subsidence by the caving method is 45.7 and 13.3 cm, respectively. Regarding shallow orebodies, the open-pit slope is obviously disturbed by the caving method and room and pillar mining method. Hence, slope displacement monitoring should be emphasized. Compared with the other two methods, the backfill mining method can use mined wastes as backfill materials and has less influence on the roof and surface during stoping and is better at controlling slope stability.

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Structural and geomorphological controls of the present-day landslide in the Moulares phosphate mines (western-central Tunisia)

Cited by 17 publications

References 10 publications

Effects of Tectonic Stresses and Structural Planes on Slope Deformation and Stability at the Buzhaoba Open Pit Mine, China

Effects of Tectonic Stresses and Structural Planes on Slope Deformation and Stability at the Buzhaoba Open Pit Mine, China

Mechanism Analysis and Process Inversion of the “7.26” Landslide in the West Open-Pit Mine of Fushun, China

Numerical Investigation on Stratum and Surface Deformation in Underground Phosphorite Mining Under Different Mining Methods

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